* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    background: #131516;
}

body {
    min-height: 100vh;
    color: var(--color-text);
    font-family: var(--body-font);
    overflow-x: hidden;
    line-height: 1.5;
    background: transparent;
}

#background-layer {
    position: fixed;
    inset: -12vh -10vw;
    z-index: -3;
    pointer-events: none;
    background:
        radial-gradient(circle at 18% 24%, var(--color-bg-highlight), transparent 24%),
        radial-gradient(circle at 78% 28%, var(--color-bg-accent), transparent 18%),
        conic-gradient(from 180deg at 50% 50%, var(--color-bg) 0deg, var(--color-surface-2) 180deg, var(--color-bg) 360deg);
    filter: blur(58px) saturate(112%);
    transform: scale(1.08);
}

#background-layer::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(0, 0, 0, 0.08), rgba(0, 0, 0, 0.32)),
        radial-gradient(circle at center, transparent 42%, rgba(0, 0, 0, 0.35) 100%);
}

#noise-overlay {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.14;
    mix-blend-mode: var(--color-noise-blend);
    filter: blur(0.25px) contrast(160%);
    image-rendering: auto;
}

#grid-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 999;
    opacity: 0;
    background-image:
        linear-gradient(var(--color-grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-grid-line) 1px, transparent 1px);
    background-size: 40px 40px;
}

.pixel-font {
    font-family: var(--pixel-font);
    text-transform: uppercase;
    font-weight: 400;
}

h1 {
    font-size: var(--text-h1-size);
    letter-spacing: var(--text-h1-letter-spacing);
}

h2 {
    font-size: var(--text-h2-size);
    margin-bottom: 1rem;
}

p {
    font-size: var(--text-body-size);
    color: var(--color-muted);
}

.fixed-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 2rem;
    z-index: 100;
    opacity: 0;
}

.readout-container {
    display: flex;
    gap: 2rem;
}

.readout {
    display: flex;
    flex-direction: column;
}

.readout .label {
    font-size: var(--text-readout-label-size);
    color: var(--color-surface-2);
}

.readout .value {
    font-family: var(--pixel-font);
    font-size: var(--text-readout-value-size);
}

.scroll-trigger {
    height: 540vh;
}

#viewport-content {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.rf-meter-shell {
    position: absolute;
    left: 1.75rem;
    top: 50%;
    width: var(--meter-shell-width);
    height: var(--meter-shell-height);
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 4;
}

#rfMeter {
    display: block;
    width: var(--meter-width);
    height: auto;
    color: var(--color-accent);
    transform: rotate(-90deg);
    overflow: visible;
    opacity: 0.92;
    filter: drop-shadow(0 18px 35px var(--color-glow));
}

#rfMeter .rf-bars rect {
    fill: currentColor;
}

#rfMeter rect,
#rfMeter line {
    stroke: currentColor;
}

#rfMeter #rfFade stop {
    stop-color: currentColor;
}

.tutorial-layout {
    display: grid;
    grid-template-columns: var(--layout-columns);
    gap: var(--layout-gap);
    width: var(--layout-width);
    padding: var(--layout-padding);
    align-items: start;
    justify-content: center;
}

.tutorial-column {
    position: relative;
    text-align: right;
    display: flex;
    flex-direction: column;
    gap: 1.6rem;
    padding-top: 4.2rem;
    filter: blur(0px);
    align-items: flex-end;
}

.tutorial-column h1 {
    font-size: 8rem;
    line-height: 0.8;
    margin-bottom: 0.2rem;
    align-self: flex-end;
    width: auto;
    max-width: 100%;
    text-align: right;
    margin-right: 4.5rem;
    transform: none;
}

.tutorial-column h2 {
    font-size: 2rem;
    color: var(--color-muted);
    margin-bottom: 2.8rem;
    font-weight: 400;
    align-self: flex-end;
    text-align: right;
}

.tutorial-section h3,
.tutorial-step h4 {
    font-size: var(--text-h3-size);
    margin-bottom: 0.5rem;
    text-align: right;
}

.tutorial-section p {
    font-size: var(--text-body-small-size);
    color: var(--color-muted);
    max-width: 430px;
    margin-left: auto;
    margin-right: 0;
    text-align: right;
}

.code-snippet {
    background: var(--color-surface);
    padding: 1rem;
    border-radius: var(--radius-code);
    font-family: var(--font-mono);
    font-size: var(--text-code-size);
    margin: 1rem 0;
    display: inline-block;
}

.code-snippet.output {
    background: var(--color-surface-2);
    color: var(--color-bg);
}

.tutorial-troubleshoot {
    font-size: var(--text-code-size);
    color: var(--color-muted);
    max-width: 440px;
    margin-left: auto;
    margin-right: 0;
    text-align: right;
}

.tutorial-troubleshoot ul {
    list-style: none;
    margin-top: 0.5rem;
    text-align: right;
}

.tutorial-step,
.tutorial-section {
    width: 100%;
}

.tutorial-step p,
.tutorial-step .code-snippet,
.tutorial-step .code-snippet.output {
    margin-left: auto;
    margin-right: 0;
    text-align: right;
}

.console-column {
    position: relative;
    display: flex;
    justify-content: flex-start;
    filter: blur(0px);
    padding-top: 12rem;
}

.console-window {
    width: 100%;
    max-width: var(--console-max-width);
    background: var(--color-console-bg);
    border-radius: var(--radius-console);
    overflow: hidden;
    box-shadow: 0 50px 100px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.console-header {
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--color-console-divider);
}

.console-controls .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: block;
}

.console-controls .dot.red {
    background: var(--color-accent);
}

.console-title,
.console-divider {
    color: var(--color-surface-2);
}

.console-title {
    font-size: var(--text-console-title-size);
}

.console-body {
    height: var(--console-height);
    display: flex;
    flex-direction: column;
}

.console-input-area {
    flex: 1;
    padding: 1.5rem;
}

.console-divider {
    padding: 0.5rem 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid var(--color-console-divider);
    border-bottom: 1px solid var(--color-console-divider);
    display: flex;
    justify-content: space-between;
    font-size: var(--text-console-divider-size);
}

.console-output-area {
    height: 150px;
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: var(--text-code-size);
    overflow: auto;
}

#console-output p {
    font-family: var(--font-mono);
    font-size: var(--text-code-size);
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

#console-output p.system-msg {
    color: var(--color-text);
}

.input-line {
    display: flex;
}

.input-line .prompt {
    color: var(--color-accent);
    margin-right: 0.5rem;
}

.cursor {
    width: 8px;
    height: 1.2rem;
    background: var(--color-accent);
    animation: blink 1s infinite step-end;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

#control-panel {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    width: var(--panel-width);
    background: var(--color-panel-bg);
    backdrop-filter: blur(22px);
    border: 1px solid var(--color-panel-border);
    border-radius: var(--radius-panel);
    padding: 1.5rem 2rem;
    z-index: 200;
}

.panel-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.knob-module {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.knob-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.knob {
    cursor: grab;
}

.knob-label {
    font-size: var(--text-readout-label-size);
    color: var(--color-muted);
}

#knobSvg {
    width: 92px;
    height: 92px;
    display: block;
    overflow: visible;
    filter: drop-shadow(0 18px 30px var(--color-shadow));
}

#knobSvg #knob > circle,
#knobSvg #knob > ellipse {
    fill: rgba(18, 19, 20, 0.12);
}

.status-module {
    flex: 1 1 360px;
    min-width: 260px;
    max-width: 560px;
}

.status-bezel {
    position: relative;
    display: block;
    width: 100%;
    padding: 0.9rem 1rem;
    border-radius: var(--radius-bezel);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.02)),
        linear-gradient(180deg, rgba(0, 0, 0, 0.08), rgba(0, 0, 0, 0.18));
    border: 1px solid rgba(255, 255, 255, 0.16);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.08),
        inset 0 -10px 22px rgba(0, 0, 0, 0.12),
        0 16px 30px rgba(0, 0, 0, 0.12);
}

.status-bezel::before,
.status-bezel::after {
    content: "";
    position: absolute;
    top: 50%;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.22);
    box-shadow:
        inset 0 1px 1px rgba(255, 255, 255, 0.08),
        0 0 0 1px rgba(255, 255, 255, 0.05);
}

.status-bezel::before {
    left: 12px;
}

.status-bezel::after {
    right: 12px;
}

.status-screen {
    position: relative;
    display: block;
    width: 100%;
    overflow: hidden;
    border-radius: var(--radius-screen);
    padding: 0.85rem 1rem;
    background:
        linear-gradient(180deg, rgba(17, 20, 23, 0.96), rgba(25, 28, 31, 0.98)),
        repeating-linear-gradient(
            180deg,
            rgba(255, 255, 255, 0.04) 0 1px,
            rgba(255, 255, 255, 0) 1px 4px
        );
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow:
        inset 0 2px 12px rgba(0, 0, 0, 0.55),
        inset 0 -1px 0 rgba(255, 255, 255, 0.04);
}

.status-screen::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.08), transparent 28%),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04), transparent 16%, transparent 84%, rgba(255, 255, 255, 0.03));
    pointer-events: none;
}

.status-marquee {
    display: flex;
    align-items: center;
    width: max-content;
    gap: 3rem;
    will-change: transform;
    white-space: nowrap;
}

.status-copy,
#status-marquee {
    flex: 0 0 auto;
    font-family: var(--pixel-font);
    font-size: var(--text-status-size);
    line-height: 1;
    letter-spacing: 0.04em;
    text-transform: none;
    white-space: nowrap;
    color: var(--primitive-grey-10);
    text-shadow:
        0 0 6px rgba(255, 255, 255, 0.18),
        0 0 18px rgba(255, 255, 255, 0.08);
}

.depth-module {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.depth-button {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--color-panel-border);
    background: color-mix(in srgb, var(--color-panel-bg), transparent 25%);
    color: var(--color-text);
    font: inherit;
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
}

.depth-button.is-active {
    background: rgba(214, 29, 0, 0.2);
    border-color: rgba(214, 29, 0, 0.55);
    color: #fff;
}

.depth-button.is-disabled {
    opacity: 0.32;
}

.toggles-module {
    display: grid;
    grid-template-columns: repeat(2, min-content);
    gap: 1rem 1.25rem;
    justify-content: end;
}

.toggle-group {
    display: flex;
    align-items: center;
    justify-content: center;
}

.toggle {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: var(--color-surface);
    border-radius: 34px;
}

.slider::before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: var(--color-text);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--color-accent);
}

input:checked + .slider::before {
    transform: translateX(26px);
}

body.phase-arrival .tutorial-layout {
    opacity: 1;
}

body.phase-instability .tutorial-layout {
    opacity: 0.98;
}

body.phase-breakdown .console-window {
    box-shadow: 0 50px 120px rgba(0, 0, 0, 0.48), 0 0 0 1px rgba(214, 29, 0, 0.08);
}

body.phase-collapse .console-window,
body.phase-collapse #control-panel {
    border-color: rgba(214, 29, 0, 0.18);
}

body.mode-light .status-screen {
    background:
        linear-gradient(180deg, rgba(235, 238, 240, 0.96), rgba(214, 219, 223, 0.98)),
        repeating-linear-gradient(
            180deg,
            rgba(33, 36, 38, 0.045) 0 1px,
            rgba(33, 36, 38, 0) 1px 4px
        );
}

body.mode-light .status-copy {
    color: var(--primitive-grey-10);
    text-shadow:
        0 0 6px rgba(255, 255, 255, 0.18),
        0 0 16px rgba(255, 255, 255, 0.08);
}

body.mode-light {
    --color-bg: var(--primitive-grey-10);
    --color-surface: var(--primitive-grey-25);
    --color-surface-2: var(--primitive-grey-50);
    --color-muted: var(--primitive-grey-75);
    --color-text: var(--primitive-grey-90);
    --color-accent: var(--primitive-red-90);
    --color-panel-bg: rgba(242, 242, 242, 0.58);
    --color-panel-border: rgba(33, 36, 38, 0.14);
    --color-console-bg: rgba(250, 250, 250, 0.88);
    --color-console-divider: rgba(33, 36, 38, 0.08);
    --color-grid-line: rgba(33, 36, 38, 0.08);
    --color-noise-blend: multiply;
    --color-bg-highlight: rgba(33, 36, 38, 0.09);
    --color-bg-accent: rgba(214, 29, 0, 0.08);
    --color-shadow: rgba(33, 36, 38, 0.16);
    --color-glow: rgba(33, 36, 38, 0.15);
}

body.mode-dark {
    --color-bg: var(--primitive-grey-90);
    --color-surface: var(--primitive-grey-75);
    --color-surface-2: var(--primitive-grey-50);
    --color-muted: var(--primitive-grey-25);
    --color-text: var(--primitive-grey-10);
    --color-accent: var(--primitive-red-90);
    --color-panel-bg: rgba(37, 40, 42, 0.5);
    --color-panel-border: rgba(242, 242, 242, 0.08);
    --color-console-bg: rgba(23, 26, 28, 0.9);
    --color-console-divider: rgba(255, 255, 255, 0.05);
    --color-grid-line: rgba(255, 255, 255, 0.045);
    --color-noise-blend: overlay;
    --color-bg-highlight: rgba(242, 242, 242, 0.12);
    --color-bg-accent: rgba(214, 29, 0, 0.12);
    --color-shadow: rgba(0, 0, 0, 0.35);
    --color-glow: rgba(0, 0, 0, 0.32);
}

body.mode-glitch {
    isolation: isolate;
}

body.mode-glitch #viewport-content {
    mix-blend-mode: difference;
}

@media (max-width: 1320px) {
    .tutorial-layout {
        grid-template-columns: minmax(420px, 520px) minmax(540px, 1fr);
        gap: 3rem;
        width: min(1280px, calc(100vw - 3rem));
        padding: 1.75rem;
    }

    .tutorial-column h1 {
        width: auto;
        margin-right: 2.5rem;
    }

    .console-window {
        max-width: 100%;
    }
}

@media (max-width: 1080px) {
    .rf-meter-shell {
        left: 0.25rem;
        width: 100px;
    }

    .tutorial-layout {
        grid-template-columns: 1fr;
        width: min(94vw, 760px);
        gap: 2rem;
        padding: 1.5rem;
    }

    .tutorial-column {
        text-align: center;
        padding-top: 0;
        align-items: center;
    }

    .tutorial-column h1 {
        align-self: center;
        width: auto;
        margin-right: 0;
        transform: none;
    }

    .tutorial-column h2,
    .tutorial-column h3,
    .tutorial-column h4,
    .tutorial-column p,
    .tutorial-column .tutorial-troubleshoot,
    .tutorial-column .tutorial-troubleshoot ul,
    .tutorial-column .code-snippet {
        text-align: center;
        align-self: center;
    }

    .tutorial-section p,
    .tutorial-troubleshoot,
    .tutorial-troubleshoot ul {
        margin-left: auto;
        margin-right: auto;
    }

    .console-column {
        justify-content: stretch;
        padding-top: 0;
        width: 100%;
    }

    .panel-inner {
        flex-wrap: wrap;
        justify-content: center;
    }

    .toggles-module {
        justify-content: center;
    }
}

@media (max-width: 720px) {
    .fixed-header {
        padding: 1rem;
    }

    .readout-container {
        gap: 1rem;
        flex-wrap: wrap;
    }

    .rf-meter-shell {
        display: none;
    }

    .tutorial-layout {
        width: min(94vw, 680px);
        padding: 1rem;
    }

    .tutorial-column h1 {
        font-size: 4.5rem;
    }

    .tutorial-column h2 {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .console-body {
        height: 320px;
    }

    #control-panel {
        bottom: 1rem;
        width: calc(100% - 1rem);
        padding: 1rem;
    }

    .knob-module {
        gap: 1rem;
    }

    .depth-module {
        order: 3;
    }

    .status-module {
        order: 2;
        width: 100%;
    }
}